|Born||December 3, 1936|
Seattle, United States
|Known for||Non-standard analysis|
|Institutions||University of Wisconsin-Madison|
|Doctoral advisor||Alfred Tarski|
|Doctoral students||Frederick Rowbottom|
Howard Jerome Keisler (born 3 December 1936) is an American mathematician, currently professor emeritus at University of Wisconsin-Madison. His research has included model theory and non-standard analysis.
Following Abraham Robinson's work resolving what had long been thought to be inherent logical contradictions in the literal interpretation of Leibniz's notation that Leibniz himself had proposed, that is, interpreting "dx" as literally representing an infinitesimally small quantity, Keisler published Elementary Calculus: An Infinitesimal Approach, a first-year calculus textbook conceptually centered on the use of infinitesimals, rather than the epsilon, delta approach, for developing the calculus.
He is also known for extending the Henkin construction (of Leon Henkin) to what are now called Henkin-Keisler models. He is also known for the Rudin-Keisler ordering along with Mary Ellen Rudin.
He held the named chair of Vilas Professor of Mathematics at Wisconsin.
Among Keisler's graduate students, several have made notable mathematical contributions, including Frederick Rowbottom who discovered Rowbottom cardinals. Several others have gone on to careers in computer science research and product development, including: Michael Benedikt, a professor of computer science at the University of Oxford, Kevin J. Compton, a professor of computer science at the University of Michigan, Curtis Tuckey, a developer of software-based collaboration environments; Joseph Sgro, a neurologist and developer of vision processor hardware and software, and Edward L. Wimmers, a database researcher at IBM Almaden Research Center.
|This article about an American mathematician is a stub. You can help popflock.com resource by .|